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Proceedings Paper

Dynamic, full-spectral interrogation of fiber Bragg grating sensors for impact testing of composite laminates
Author(s): A. Propst; K. Peters; M. A. Zikry; W. Kunzler; Z. Zhu; M. Wirthlin; R. Selfridge; S. Schultz
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Paper Abstract

This paper presents the full-spectral measurement of fiber Bragg grating sensor responses during impact testing of composite laminates. The sensors are embedded in carbon fiber/epoxy laminates which are subjected to multiple low velocity impacts until perforation of the laminate occurs. Applying a recently developed high-speed interrogator, the Bragg grating sensor interrogation is demonstrated at 534 Hz over a 14.9 nm bandwidth. The measurement of the transient response of the grating sensors during impact reveals unique spectral signatures that could not be detected through peak-wavelength monitoring or post-impact full-spectral scanning of the sensors, including local relaxation of the laminate.

Paper Details

Date Published: 5 October 2009
PDF: 4 pages
Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75030G (5 October 2009); doi: 10.1117/12.835406
Show Author Affiliations
A. Propst, North Carolina State Univ. (United States)
K. Peters, North Carolina State Univ. (United States)
M. A. Zikry, North Carolina State Univ. (United States)
W. Kunzler, Brigham Young Univ. (United States)
Z. Zhu, Brigham Young Univ. (United States)
M. Wirthlin, Brigham Young Univ. (United States)
R. Selfridge, Brigham Young Univ. (United States)
S. Schultz, Brigham Young Univ. (United States)

Published in SPIE Proceedings Vol. 7503:
20th International Conference on Optical Fibre Sensors
Julian D. C. Jones, Editor(s)

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